Razor-blade sharpener



A. H. SALSTROM.

RAZOR BLADE SHAHPENER.

- APPLICATION FILED JULY 8.1919.

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Patented. Aug. 8, 1922.

3 SHEETS-SHEET I.

iwenbm y WZ Pimm A. R. SALSTROM.

RAZOR BLADE SHARPENER. APPLICATION FILED JULY 3,1919.

l A2529 Patented Aug. 8, 1922,

3 SHEETS-SHEET 2.

A. R. SALSTROM.

RAZOR BLADE SHARPENER.

APPLICATIQN man JULY 8,1919.

Patented Aug. 8,

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Specification of Letters 'iatent Patented Aug.' 8, i922.

.Application filed July 8, 1919. Serial No. 309,323.

To all whom t may concer/'n Be it known that I, AXEL RUDOLPH SAL- sinoM, a subject of the King of Sweden, residing'` at Jersey City', in the county` of Hudsonand State oit New` Jersey, have inventedr certain new and useful improvements in n-azonBlade Sharpeners; and l do hereby declare the following` 'tol be a llull, clear, and exact description of the invention, such as will enable others skilled in .he art to which it appertains make and use the saine.

The present invention relates to improvements in razor blade sharpeners and has :tor an objet to provide a compact machine in which the movable parts are contained in a casing for avoiding' the likelihood ot an operators lianes coming in contact with and sustaining' injury by such parts.

Another object et this invention resides in providing an encased machine, in whichv a blade holder is arranged to slide into and out oi"- the casing' to receivea blade to be sharpened and with which is associated parts th at li mitthe movement of the holder and prevent its becoming disconnected 'trom the casing.

lt is a 'further object ot the lpresent invention to providel a sharpening` machine for razor blades and the like, which embodies improved driving means for the sharpening1 means, and improved mecha.- nisin for oscillating the blade holder, which includes parts for securing` the holder against oscillation neutral Aposition between the sharpening rolls when the holder is withdrawn from the casing` to permit the removal of the blade.

lVith the foregoing and other objects in view, the invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, which illustrate ay single mechanical embodiment oit-which the invention is susceptible, whereinv like reiterence characters refer to like or corresponding parte throughout the several views, and in which,

Fig. l is a perspective view taken from..

one end, of a sharpening machine constructed in accordance with the present invention.v

F 2 is a similar view taken :from vthe opposite endl y Fig. 3 is a plan view ci the complete ma chine, with the blade holder drawn out and the casing shown in dotted lines.

Fig. l is a side view yot the same. w nig 5 is an end kview looking from the 3 and i and with the end cap removed.

Fig. @fis a similar view seen from the other end. 'Y

ig. 7 is central horizontal section through the machine. Fig'. 8 is a central vertical section through theI machine. lFig 9 is a section taken on the line 9 9 in Fig'. showing` the oscillatinga mechanism for the blade holder in one position.

Fig. `l() is a similar view showing the o'scillating mechanism in a subsequent position. i l l Fig'. il -is a cross sectional view taken on the line ll-ll in Fig. 7. showing,i the blade holder and blade in the horizontal neutral position,

F l2 is a section taken on the line 1Q-, l2 in Fig'. 7 yand showing the blade holder and blade in theneutral position.

' Fig. i3 is a view similarto Fig. ll with the blade holder and blade in a canted posi-` tion.

Fig. lil is a view similar to Figi".v l2 also showinad the blade holder and blade canted to one side.

l5 is a longitudinal section through one ot the sharpening` rolls.

l g'. i6 is across section through one oi' the cams and its actuating gear.'

Fig. l? is a perspective view of the up# per member of the blade holder and the slotted stop frame.

Fig. 18 is a similar view oi' the lower slidmember oit the blade holder.

Fig'. 19 is a perspective view of the bracket and spring` arms of the oscillating,- mechanism.

controlling the stop mechanism.

, Fig. 2l is 'a perspective view .of the crank employed, and l Fin: 22 is a fragmentary perspective view showing the connection betweenthe discs and bars'. i

Referring more particularly to the drawings, l designates a tubular body otthin metal, which, together with flanged caps 2 and fitting over the open ends ot the body, forms a .casing `tor enclosing the various parts of the machine..v

Asl have constructed the device in praetice, 'the approximate actual size of which 2O is a similar view ot the key for" I is illustrated, this tubular body 1yis with advantage made vsubstantially oval in'v crossA section thatit may the better lend itselfjto the grasp of one of an operators hands, in

' which the machine is held, while the other handis leftfree to rotate a crank for developing the necessary power to turn the sharpeningrolls and actuate the other mechanism. The casing. serves the further purpose of excluding dust` land other foreign matter from the. interior moving parts and acts 'as 1 a guard or shield to preventthe operators hands coming in contact with the mechanism or Irazor blade. p

`Within thecasing is a frame forsupporting the various parts, andas shown `in Figs. 3,f 1, 7 andv8, this Yframe is composed of a number of oval rdiscs connected by bars l.

it .the righthandend of the machine -as it ppear'sin these Yfigures therek are shown a pair of discs a'nd'G; while at the opposite j j end are three discs7, 8 and 9, all being held v apart to provide spaces therebetween for containing the several mechanisms i Four bars 4f; are used 1n the present machine 'tof 4 lhold the discstogether and at the proper interval apart, although a greater or lesser number might be employed, and as seen in the connection between the discs and bars is'preferably made `by producing slots y10 in the edges of the discs andfslotsll in the adjacent faces of the barsv L1*, vthe slots being interfitted in the manner shown so that 'the outer faces of the bars may lie flush `withthe edges of the discs and. form a bularbody 1 may with facility be slipped.

Screws or other fastening means 12 taking into the end discs 5 and 9 as appears in Fig...

7 are used` to holdthe caps 2 and` 3'in place.

Alp'air'o'f upper shafts `13 and 14: and aare mounted on' the shafts 13 14, 15 andl,

n y' the preferred construction of the rolls being shown inUFig. 15. wherein 21 .designates an vinner hollow lcylindrical. shell .and .'22 an outer strip 'of'leather'or 'other'honing mate;

rial spirally wrappedy about the shell- 21 and secure/d thereto as .by adhesive or other ap` propriatey means. f :The spiral strip 22 when rotatedfign contact'with the blade not only moves lat right `:angles to` the edgeof the blade but also 'progresses llongitiidinally of the blade edge` and causes a smooth anduniform sharpening ofthe edge throughout.

Heads 273 'and 24 are `fittedin the ends of th-eshell 21 andare perforated to receiveI the shafts. A pin 25 passes through the shell 21 and enters'. the head 23 to secure same in place.v The opposite head 2st is held by a setseiew 26 which projects vin the perforation in this'head-and, when the roll ismounted on its shaftsuch screwv26 serves' to make the roll'fast thereon. l

Referring to Fig". ltithe shafts 13. and 1,5 carry geary wheels 27 and 23 whichrare in mesh. "The shafts 111l an'd'16 also carry simi-. lar gear wheelsv29 and 30,'which mesh together but vdo notniesh with the` wheels 27 and 23. y These various gear wheels yare shown in dotted lines as they are `comprised in the space between fthe discs 8 and 9 asis clear from Figs. 3, t, 7 and Still referring .to Fig. 5"the` shafts 14: and

15 are provided ywith pinions 31 and 32 I which are in mesh with a central gear wheel. .33 on a stub shaft 341 journaled in the discs 8 and 9. The, pinions 31 and32 and gear wheel 33 are shown `in fulllines in this Fig. 5 as they are in front of the disc 9 for whichseeFigs. 3, 1l, 7 and 8. j i i .j The v shaft 15 is extended .and passes through the cap 3 to the exteriorof the cass ing, as appears in Figs. 1, 3, `and 7, where it is exposed to. receive a-crank. The eX posed end of the shaft 15 is `furnished with a pin 35 for engagement withay crank,such

for instance as .sh-own in Fig. 21, where'thev i arm 36 of the crank is .provided with'a yhandle 37 at one end projecting in one direction and a bearing sleeve 33'at the other end;

extending in the opposite direction. The outer end ofthe sleeve-is -made after' the fashion of acam with an inclined wall'39 and an abrupt shoulder l0 lying in the` direction of the axis of the sleeve and connecting the inner andouter vends ofthe yinclined orlpartially spira-l wall 39. i

n use, the crank 1s so fitted i toi the ma;

chine that'the sleeve engages over the proy j ecting end of the shaft 15 and when turned in a right hand or clockwise direction, the shoulder 1'() ofthe crank will take .against the pin 35 and transmit rotation tothe shaft 15. l This clock-wise direction is the one'toy cause the various rolls to rotate withlproper4 relation tov theedges of the blade and, were the rolls to'be rotated in an opposite direction injury 'would be done both thejblade. and the rolls. Shouldthe crank berotated in the opposite. direction in an attempt to? improperly turn they rolls the inclined or spiral vface 39 willengage the pin 3,5.,l and cause the vsleeve. to be shiftedr axially 'on the shaft 115 away 'from suchpin so that no effectiveengagementbetween the crank and shaft may be obtained in this direction.

Whenthe crank isl correctly rotated inthe y clock-wisedirectionthe result onthe gearing is shown by the. arrows in Figs.y 5 and 13,

in the latter of whichvpigures it is madel plainy that the various honing surfaces, each moves in la direction from the centre of the blade toward and beyond the edge thereof.

The blade to be sharpened is indicated at 41 as being the usual double edgedblade, used for instance in the Gillette safetyrazor, although the invention is applicable for use in connection with other types of blades. The blade 41 is adapted to be seated on the lower member 42 `of a two-part holder, which is provided with pins 43 inthe upper Hat face thereof in order to receivethe per forations in the blade and hcldthe blade againstdisplacement The holder is more particularly shown in Figs. 17 and 18 and besides the lower member 42, consists also of an upper member 44. The two members 42 and 44 are comple-v ments and are adapted to clamp the blade 41 therebetween and hold the same securely while being sharpened. These two members are made preferably in a cylindrical form which is split longitudinally. The member 44 has a reduced journal 45 at one end fitted inthe disc 7, while the other ends of thev members 42 and 44 are journaled in the discs 5 and 6. The lower member or holder proper is longitudinally slidable on the `upper member 44 and has at its inner end avpair of curved claws 46, which lightly clamp over the edges o f the upper member and freely slide thereon. A shoulder 47 on the eXtreme inner end of thel member 42 is arranged to enter a notch 48 in the trunnion 45 as shown in Fig. ,8, whereby to sustain this end of the lower member when pushed home and to take the 'weight olf the claws 46 while the operation of sharpening out.

Figs. 3 and 4 Ashow the position `of the member 42 when drawn out, openings being made in the discs 5 and 6 and an opening 49 in the cap 2 to permitsame. The notch 50 shown in F 2 is to allow ofthe passage of the tops of the pins 43, while the sideA slots of the opening 49 permit the removal of the cap 2 over the linger piece 51 that is formed at the outer end of thelower member 42 of the holder. `When drawnout, the member 42 clears the casing and the sharpened blade may be removed and another substituted. The claws, however, engage against the wall of the cap 2 above the slot 49 and prevent the member 42 from becoming disconnected from the machine, while maintaining such member in proper position to be slid back when a subsequent blade has been placed thereon. l

The blade holder including both uppe and lower members is adapted to be oscillated and this is accomplished in the following manner:

A pinion 52 is mounted on the inner end of the stub shaft 34 and as shown in Figs. 9 and 10 this pinion meshes with and drives is being ,carried two other pinions 53 and 54 loosely mounted respectively on the shafts 15 and 16. These pinions 53 and 54 carry cams 55 and set at 189O apart, the cams and pinions being preferably constructed in one piece as shown in llig. 16. y

The cams 55 and 56 alternately engage springarms 57 and 58 curved at their lower free ends where they encounter the cams, and being` preferably formed in one piece in the shape of a yoke, `which is suspended on the overhanging end 59 of a bracket 60 shown in Fig. 19. The bracket has perforations 61 tting over pins 62 on a flattened portion 63 of the upper member 44 of the blade holder and a central perforation 64 adapted to register with a threaded opening` 65 in the portion 63, which receive a` screw 66 shown in Figs. -7 and 8. Y

The camsalternately striking the spring arms 57 and 58 set up a rocking movement in the blade holder and blade and cause the edges of the blade tc be brought incontactV with first one set of rolls 17 and 20 as appears in F ig. 13 and subsequently in engagewith the other set of rolls 18 and 19, and the resilient character of the arms 57 and 58 causes the blade to be rmly, yet yieldingly, pressed against the honing surfaces.

As seen in Fig.,17, the holder is provided with a stop frame 67 slotted as indicatedat 68 and oscillating between the discs 5 and 6. A key 69 shown in Fig. 2O has a thumb piece 70 by which it may be turned, and iingers 71 projecting in opposite directions. 100

The fingers lie within the slot 68 of the stop frame as shown in Figs. 8, 12 and 14, and when in the position illustrated 4in Fig. 14 the frame andthe holder are free to oscillate. By turning the key 69 through` a quar.- 105 ter of a revolution, the fingers 71 arebrought to the position shown in Fig. 12 andthe frame and holder can no longer be rocked. 1f the crank is turned when the parts are in this position, the spring arms 57 and 58 110 will yield and allow the cams 55 and 56 to be turned without affecting the blade holder.y

The position of the key 69isv shown inv Fig. 2, it extending throughaslot 72 in thedcap 2, which permits removal ofthe cap 115 over the thumb piece 70, but the slot is smaller than the fingers 71 and hence the key cannot escape or be lost. The shank of the key is projected inward beyond the arms,

and when in place as shown in Fig. 8 this 120 portion of the shank has a bearing in the disc 6.

The purpose of the stop mechanism is to hold the blade holder in a central neutral position with the blade out of contact with 125 the rolls as appears in Figs. 11 and 12. In this position the blade holder may be withdrawn without incurring the danger of in jury to the rolls or blade.

The object in having the cams 55 and 56 130 loosely mounted'on the .shafts 115 and 16 and in employing separategearino to rotate the same, 1s to secure a reduction in the rotation oftheca'ms as,V compared With the shafts in order that the blade yedges maybe held tor an extended period oil' time in contact with the rapidly moving rolls.

Fromthe above it will be appreciated that l have provided a compact machine for strop-ping razorblades in which blades are inserted and removed safely and expeditiously, and the likelihood of injury to the operator avoided. i

I' desire it to be understood that various changesand modifications may be resorted to Without departingirom the spirit of my in-` vention, provided such changes lall Within thescope of the appended claims.

Nhat isA claimed is: y v v 1.4 A razor Sharpener including a supporting frame, vsharpening rolls mounted ythereon, means torotate the rolls,'a rocking blade holder in the frame, cams turning with said rolls, spring arms on the blade holder in con tact with Said cams, a slotted frame on the blade holder, and a key also mounted in the supporting frame and having oppositely-proj'ecting fingers Working in said slotted frame and adapted Whenfin one position to hold the frame andthe blade holder against rocklng.

'2; A razor Sharpener' comprising aV supporting firame, pairs of sharpening rolls mounted in the frame and disposed at opposite sides of a central supporting` space, anoscillating blade'holder arranged in said. space,`meansto rotate Vsaid rolls, yieldable means associated With the blade rotating means for rocking-said blade holder, andmeans onarresting the movement'of the blade holder While permitting of the operation oftherolls.'V f

v3. In a razor Sharpener, a 'supporting frame, sharpening rolls mounted therein and beingarranged inpairs at opposite sides of acentral space means to rotate said rolls,

an oscillating blade holder fitted in the space, cams `'set n at substantially 180 apart and' vturned by said'rolls, a spring yolre having yieldable ends arranged `inthepath fo'gtl said cams 'andfadapted'to be alternately operated, said yoke -i being mounted .on the vblade holder, anjopen frame Lalso "mounted -on said blade holder, and means'carried by said sup`- porting frame for engaging saidfopen yiframe to prevent rocking of theblade holder While permitting yof the movement f of' therolls.

f4. A razor blade Sharpener comprising ya framework 'composed of a plurality -of spaced vapart discs, bars having vspaced apart notches "adapted to engage *'vvi'thij the discswhereby to secure the same togetherya tubusaid bladeholder While they stropping means' their edges, seriesfof bars having spaced apart cutout portions adaptedtointerit blade` Sharpener, the 'combi-` nation' of a framework composedjo a'pluf' rality of discsha'vingjcut away' portions'inj 75 Withv the cut out edges of theV discs, theouter'l faces of the'barsadapted to lieVflush with thel edges oftheI discs, atubular casingy adapted to be removably slipped over the edges'of said discs andthe outer 'faceso' said bars, removable caps *iittingover the.'

ends of said tubular casing, stroppingffrolls supported by thediscs vvithinthe 'casing,

gearing for rotating'jthef rolls mounted at one side of one 'of the discs, a bladeholder' rockingly supported by certain other of the discs, means for jrocki'ngfthe blade holder,

means orrotating the rolls `and for actuatf` and' means* ing said last. named vmeans,

wherebyy the rocking movement "of the blade y holder ,may be arrested.

AXEL RUDOLPH sALsrriaoM.

Witnesses: v FRANK?. YoG'LoM,

l y JoHNJ. DQLAN. 

